Kaon_LT Experiment

PID (software) efficiencies...

• For a check, have to first create a clean sample of the particle of interest
  • e.g. kaons for the aerogel cut efficiency
  • To create clean sample for checking aerogel, cannot use aerogel itself. Must use Cherenkov or something else.

• For the study, make cuts to create the clean sample very tight (much stricter than normal)
  • Then take the ratio of events with the aerogel cuts required in the analysis
    • e.g. NPE>1 and without
  • The results are the PID efficiency

• It is good to check the efficiency stability over all runs